By 2030, half the world’s oceans could be reeling from climate change, scientists say

The Washington Post reports: More than half the world’s oceans could suffer multiple symptoms of climate change over the next 15 years, including rising temperatures, acidification, lower oxygen levels and decreasing food supplies, new research suggests. By midcentury, without significant efforts to reduce warming, more than 80 percent could be ailing — and the fragile Arctic, already among the most rapidly warming parts of the planet, may be one of the regions most severely hit.

The study, published Tuesday in the journal Nature Communications uses computer models to examine how oceans would fare over the next century under a business-as-usual trajectory and a more moderate scenario in which the mitigation efforts promised under the Paris Agreement come into effect. In both scenarios, large swaths of the ocean will be altered by climate change.

Nearly all of the open sea is acidifying because of greenhouse gas emissions. But the researchers found that cutting greenhouse gas emissions could significantly delay future changes, giving marine organisms more time to migrate or adapt. [Continue reading…]

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